Mastic asphalt is
Water proof
Fire proof
Elastic
All the above
Correct Answer :
D. All the above
Related Questions
Second class bricks
Are of dark brown colour
Produce a metallic sound when struck
Are well burnt
Are under burnt
Bitumen emulsion is
A liquid containing bitumen in suspension
A paint
Used as anti-corrosive paint
All the above
If P is the percentage of water required for normal consistency, water to be added for determination of initial setting time, is
0.70 P
0.75 P
0.80 P
0.85 P
Pick up the correct statement from the following:
Rusting is caused due to combined action of air, moisture and carbon dioxide
During rusting, first ferrous bicarbonates are formed
On further oxidation ferrous bicarbonates get converted to ferric bicarbonates
All the above
Apiece of sawn timber whose cross-sectional dimensions exceed 5 cm, in one direction and 20 cm in the other direction, is called a
Cant
Deal
Baulk
Strip
For slaking of 10 kg of CaO, the theoretical amount of water is
2.2 kg
1.5 kg
3.2 kg
None of these
Which of the following stone is best suited for construction of piers and abutments of a railway bridge?
Granite
Sand stone
Lime stone
Quartzite
Cast iron is used for
Structural works in beams
Small sized water pipes
Columns and struts
None to these
Which of the following stresses is used for identifying the quality of structural steel?
Ultimate stress
Yield stress
Proof stress
None of the above
Stainless steel resists corrosion due to
Carbon
Sulphur
Vanadium
Chromium
Good quality stones must
Be durable
Be free from clay
Resist action of acids
All the above
Iron ore may contain
Carbon
Silicon
Phosphorus and manganese
All the above
Which one of the following polymers is obtained from condensation polymerization?
Phenol formaldehyde
Carbamide
Melamine-formaldehyde
All of these
The stone suitable for rubble masonry should be.
Hard
Tough
Heavy
Light
Chlorite, a green colour mineral is mainly derived from the decomposition of
Augite
Biotite
Hornblende
All of these
The proportions of lime and sand in the mortar normally used in brick construction are
1 : 2
1 : 4
1 : 6
1 : 8
Mastic asphalt is
Water proof
Fire proof
Elastic
All the above
Soundness of cement is tested by
Vicat's apparatus
Le-chatelier apparatus
Compressive strength testing apparatus
None of these
The process of mixing clay, water and other ingredients to make brick is known as
Kneading
Moulding
Pugging
Drying
A good quality stone absorbs water less than
5 %
10 %
15 %
25 %
Lime stone is not a
Sedimentary rock
Stratified rock
Aqueous rock
Metamorphic rock
The coefficient of hardness of stones used in road work should be greater than
10
12
15
17
The commonly used base for iron and steel work, is
Red lead
Zinc white
White lead
Titanium white
Specific gravity for most of the building stones lies between
1.5 to 2.0
2.0 to 2.5
2.5 to 3.0
3.0 to 3.5
Cement paints usually
Contain hydrated lime
Contain 5% to 10% colour pigments
Contain 5% sodium chloride
All the above
A piece of timber whose thickness and width are respectively 5 cm and 10 cm is called
Slate
Plank
Board
Strip
Gypsum consists of
H₂S and CO₂
CaSO4 and H₂O
Lime and H₂O
CO₂ and calcium
Brass is an alloy of
Copper and zinc
Zinc and lead
Tin and silver
Zinc and nickel
If the ore impurities is
Clay, lime stone is used as flux
Lime stone, clay is used as flux
Quartz, lime stone and argillaceous iron ores are used as flux
All the above
The variety of pig iron used for manufacture of wrought iron, is
Bessemer pig
Grey or foundry pig
White forge pig
Mottled pig